<template>
  <div :class="{ search__col: layout === 'right' }">
    <el-row :gutter="20">
      <el-col :span="layout === 'right' ? 22 : 24">
        <el-form
          ref="ruleForm"
          inline
          :model="formInline"
          :rules="rules"
          :label-width="labelWidth"
          :label-position="labelPosition"
          :hide-required-asterisk="hideRequiredAsterisk"
          @submit.prevent
        >
          <el-form-item v-for="(item, $index) in data" :key="$index" :label="item.label" :prop="item.field" :rules="item.rules">
            <template v-if="item.itemType === 'switch'">
              <el-switch
                v-model="formInline[item.field]"
                v-bind="{ ...getItemBindValue(item) }"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              />
            </template>

            <template v-if="item.itemType === 'input'">
              <el-input
                v-model="formInline[item.field]"
                v-bind="{ ...getItemBindValue(item) }"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              />
            </template>

            <template v-if="item.itemType === 'select'">
              <el-select
                v-model="formInline[item.field]"
                v-bind="{ ...getItemBindValue(item) }"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              >
                <el-option
                  v-for="v in item.options"
                  :key="item.optionValue ? v[item.optionValue] : v.value"
                  :value="item.optionValue ? v[item.optionValue] : v.value"
                  :label="item.optionLabel ? v[item.optionLabel] : v.title"
                />
              </el-select>
            </template>

            <template v-if="item.itemType === 'radio'">
              <el-radio-group
                v-model="formInline[item.field]"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              >
                <template v-if="item.radioType === 'radio'">
                  <el-radio
                    v-for="v in item.options"
                    :key="item.optionValue ? v[item.optionValue] : v.value"
                    v-bind="{ ...getItemBindValue(item) }"
                    :label="item.optionValue ? v[item.optionValue] : v.value"
                  >
                    {{ item.optionLabel ? v[item.optionLabel] : v.label }}
                  </el-radio>
                </template>
                <template v-else-if="item.radioType === 'button'">
                  <el-radio-button
                    v-for="v in item.options"
                    :key="item.optionValue ? v[item.optionValue] : v.value"
                    v-bind="{ ...getItemBindValue(item) }"
                    :label="item.optionValue ? v[item.optionValue] : v.value"
                  >
                    {{ item.optionLabel ? v[item.optionLabel] : v.label }}
                  </el-radio-button>
                </template>
              </el-radio-group>
            </template>

            <!-- element近期会新增treeSelect组件，所以不打算在自己维护一套。等待ing -->
            <!-- <template v-if="item.itemType === 'treeSelect'">
              <el-tree-select
                v-model:value="formInline[item.field]"
                :size="item.size"
                :dropdown-style="item.dropdownStyle"
                :tree-data="item.options"
                :placeholder="item.placeholder"
                :tree-checkable="item.treeCheckable"
                :max-tag-count="item.maxTagCount"
                :tree-default-expand-all="item.treeDefaultExpandAll"
                :allow-clear="item.allowClear"
                style="min-width: 201px;"
                @change="((val) => {changeVal(val, item)})"
              >
                <template #title="{ title }">
                  <span>{{ title }}</span>
                </template>
              </el-tree-select>
            </template> -->

            <template v-if="item.itemType === 'timePicker'">
              <el-time-picker
                v-model="formInline[item.field]"
                v-bind="{ ...getItemBindValue(item) }"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              />
            </template>

            <template v-if="item.itemType === 'timeSelect'">
              <el-time-select
                v-model="formInline[item.field]"
                v-bind="{ ...getItemBindValue(item) }"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              />
            </template>

            <template v-if="item.itemType === 'datePicker' || item.itemType === 'dateTimePicker'">
              <el-date-picker
                v-model="formInline[item.field]"
                v-bind="{ ...getItemBindValue(item) }"
                @change="
                  (val) => {
                    changeVal(val, item);
                  }
                "
              />
            </template>
          </el-form-item>
          <el-form-item v-if="data.length > 0 && layout === 'classic'">
            <el-button type="primary" icon="el-icon-search" @click="submitForm">查询</el-button>
            <el-button v-if="showReset" icon="el-icon-refresh-right" @click="resetForm">重置</el-button>
          </el-form-item>
        </el-form>
      </el-col>
      <el-col :span="layout === 'right' ? 2 : 24">
        <div
          v-if="data.length > 0 && (layout === 'bottom' || layout === 'right')"
          class="search__bottom"
          :class="{ 'search__bottom--col': layout === 'right' }"
        >
          <div class="search__bottom--button">
            <el-button type="primary" icon="el-icon-search" @click="submitForm">查询</el-button>
          </div>
          <div class="search__bottom--button">
            <el-button
              v-if="showReset"
              :style="{
                'margin-left': layout !== 'right' ? '15px' : '0',
                'margin-top': layout === 'right' ? '27px' : '0',
              }"
              icon="el-icon-refresh-right"
              @click="resetForm"
            >
              重置
            </el-button>
          </div>
        </div>
      </el-col>
    </el-row>
  </div>
</template>

<script>
  import { defineComponent, PropType, watch, ref, unref } from "vue";
  import { deepClone } from "@/utils";
  export default defineComponent({
    name: "Search",
    props: {
      // 表单域标签的宽度，例如 '50px'。作为 Form 直接子元素的 form-item 会继承该值。支持 auto。
      labelWidth: {
        type: String,
        default: "",
      },
      // <'right' | 'left' | 'top'>
      labelPosition: {
        type: String,
        default: "right",
      },
      // 隐藏所有表单项的必选标记
      hideRequiredAsterisk: {
        type: Boolean,
        default: true,
      },
      // 表单数据对象
      data: {
        type: Object,
        default: () => {},
      },
      // 表单验证规则
      rules: {
        type: Object,
        default: () => [],
      },
      // 是否显示重置按钮
      showReset: {
        type: Boolean,
        default: true,
      },
      // 是否显示导出按钮
      showExport: {
        type: Boolean,
        default: false,
      },
      // 风格 'classic' | 'bottom' | 'right'
      layout: {
        type: String,
        default: "classic",
      },
    },
    emits: ["search-submit", "reset-submit", "change"],
    setup(props, { emit }) {
      const ruleForm = ref(null);
      const formInline = ref({});
      watch(
        () => props.data,
        (data) => {
          initForm(data);
        },
        {
          deep: true,
          immediate: true,
        }
      );

      function getItemBindValue(item) {
        const delArr = ["label", "itemType", "value", "field"];
        const obj = deepClone(item);
        for (const key in obj) {
          if (delArr.indexOf(key) !== -1) {
            delete obj[key];
          }
        }
        return obj;
      }

      function initForm(data) {
        for (const v of data) {
          formInline.value[v.field] = formInline.value[v.field] || v.value;
        }
      }

      async function submitForm() {
        const form = unref(ruleForm);
        if (!form) return;
        try {
          form.validate((valid) => {
            if (valid) {
              emit("search-submit", unref(formInline));
            } else {
              console.log("error submit!!");
              return false;
            }
          });
        } catch (err) {
          console.log(err);
        }
      }

      async function resetForm() {
        const form = unref(ruleForm);
        if (!form) return;
        await form.resetFields();
        emit("reset-submit", unref(formInline));
      }

      function changeVal(val, item) {
        if (item.onChange) {
          emit("change", {
            field: item.field,
            value: unref(formInline.value[item.field]),
          });
        }
      }

      return {
        getItemBindValue,
        ruleForm,
        formInline,
        submitForm,
        resetForm,
        changeVal,
      };
    },
  });
</script>

<style lang="scss" scoped>
  .ant-form-inline {
    .ant-form-item {
      min-height: 60px;
    }
    .ant-form-item-with-help {
      margin-bottom: 0;
    }
  }
  .search__bottom {
    text-align: center;
    padding-bottom: 20px;
    .search__bottom--button {
      display: inline-block;
    }
  }
  .search__bottom--col {
    padding-bottom: 0;
    margin-top: 5px;
    position: relative;
    .search__bottom--button {
      display: inline-block;
    }
  }
  .search__bottom--col::before {
    content: "";
    width: 1px;
    height: 100%;
    border-left: 1px solid #d9d9d9;
    position: absolute;
    top: 0;
    left: 0;
  }
</style>
